Invention Grant
US07985485B2 Copper foil for high frequency circuit, method of production and apparatus for production of same, and high frequency circuit using copper foil 失效
铜箔用于高频电路,生产方法及其生产设备,以及使用铜箔的高频电路

Copper foil for high frequency circuit, method of production and apparatus for production of same, and high frequency circuit using copper foil
Abstract:
A copper foil reducing transmission loss at a high frequency and excellent in bond strength with a resin substrate, including at least a granular layer and a columnar layer in its thickness direction, the columnar layer being formed on at least one surface of the granular layer forming the copper foil or the granular layer being formed on at least one surface of the columnar layer forming the copper foil, the relation of the thickness A of the granular layer and the thickness B of the columnar layer in the copper foil being preferably A/(A+B)=40 to 99%, a method of production and apparatus for production for the same, and a high frequency circuit using the same.
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